What aspect of security is preserved when data remains unchanged from source documents?

When data remains unchanged from source documents, it preserves data integrity. Data integrity refers to the accuracy, consistency, and trustworthiness of data throughout its lifecycle. When information is maintained in its original form from the source, it ensures that the data can be relied upon for decision-making and analysis. Any alterations or errors introduced into this data can compromise its integrity, so maintaining it unchanged is fundamental to establishing trust in the information's validity.

In contrast, system integrity relates to the operational functionality of a system; risk control focuses on measures taken to mitigate potential threats and vulnerabilities. Data redundancy refers to the unnecessary duplication of data, which does not contribute positively to data integrity and may complicate data management. Therefore, the preservation of data as it is received from source documents is crucial in warrantying its integrity.